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Hi, using a Hammond A100 and a Leslie 145... the Hammond has a variable line output that I feed into a Neo Ventilator, which in turn feeds two active 150w studio speakers. The Neo Ventilator has a

Hi Chris, thanks for the clarification.? I spent a little time online and now have a better understanding.? This site gives a good description of the Leslie console kit near the bottom of the

I have the trek effects loop fitted plus trek output (low pass very usefull for pedals). I have to say that I’ve not had opportunity to test many effects, and the ones I have were a little

In a standard 122 installation there is an isolating transformer in the connector kit, the DC speed control voltage is applied to the centre tap of the secondary of this transformer. The centre tap of

With this direct out circuit, if the B3 is wired for a Leslie 122 doesn't the 'G' output have a DC bias (inserted via the transformer output stage center tap) dependent on the Leslie speed setting??

Removing the 0-001 capacitor connected from the top of the level control pot to the wiper in that line out circuit would likely reduce the treble somewhat. The effect of that capacitor would be to

I've used this circuit on my 1955 B2/Trek II preamp and it's pretty nice. I have noticed that it's a little trebly in output so I've wondered if there's an easy way to add a tone control to tame it,

Hi Dave, Glad you like the video. With the Line out, I can easily add distortion pedals (also a reverb), and I have experimented with many. It seems easier to get the really overdriven Jon Lord

Hi Jason, Thanks for the reply.? I really enjoyed the video - great playing and sounds on Hoedown. I'll take a look for the direct box schematics you mentioned.? I wonder if there's an easy

I have a pretty similar set up and also prefer an overdriven rock sound. I think many classic players used various guitar amps to drive their Leslies, and I have gotten my favorite results this way as

Hi All, I have a very clean unmodified 1959 B3 and a 122R Leslie.? The only mod is the Trek II reverb.? The only change to its sound I'd consider would be an option to give it the 'grind' sound

Sorry, if I was unclear in my attempt to explain. Plus/Minus are polarities normaly used in DC circuits. It was just the terminology I was commenting on. The terms could be used to express the

I'm not sure why you're saying that. Maybe you can explain more. If I'm using 2 Leslies at the same time and one of them has the 15" driver wired wrong, the 2 woofers will be out of phase. This is

Hi Dennis, welcome back again. There is no plus or minus in crossover networks. Everything is AC, so to say. Where is a distinction made, just follow the nomenclature. — Christoph

Thanks. I realized I would have to get to the underside of the board and have already lifted the board off the chassis to see if there any obvious short. I didn’t see anything that looked burnt.

Since I've sworn off all social media, I'm back to mailing lists—hoping I'm still welcome here. I'm currently rebuilding a crossover, where maintaining correct polarity is critical, especially

At some point in the repair process you would have to get to the back of the amplifier board in order to unsolder a faulty component. That's not particularly easy on the T-series. Whether you lift the

Obviously there is something seriously wrong with this organ if I’m getting 60vac at pin 17.

Haha, yeah, I’m thinking the same thing. I’ve kept my B3, C3 (x2) and A100 running for 20 years but solid state stuff is new to me. I’d hate to junk this but that may be the play here. I’be

Pin 17 and the collector of Q604 should be 25 volts DC (not AC!) when measured with the negative lead of the meter to ground (any point on the chassis) and positive to the point where you're